Code360 powered by Coding Ninjas X Naukri.com. Code360 powered by Coding Ninjas X Naukri.com
Table of contents
1.
Introduction
2.
What Are Logical Questions?
3.
Importance of Logical Reasoning in an Interview
4.
How Do I Prepare For Logical Questions In An Interview?
5.
Logical  Interview Questions for Freshers
5.1.
Question 1. For the series: 2, 1, (1/2), (1/4), ... What number should follow next?
5.2.
Question 2. For the series: 36, 34, 30, 28, 24, … What number should follow next?
5.3.
Question 3. Find the missing element for the series: SCD, TEF, UGH, ____, WKL.
5.4.
Question 4. What element should follow next for the series: FAG, GAF, HAI, IAH, ____?
5.5.
Question 5. Which word does NOT belong with the others in parsley, basil, dill, and mayonnaise?
5.6.
Question 6. Which word does NOT belong with the others in punctuation, preposition, adverb, and noun?
5.7.
Question 7. For books, which is the most necessary word? Fiction, pages, pictures, or learning?
5.8.
Question 8. What is the sum of numbers from 1 to 100?
5.9.
Question 9. Complete the series - CUP: LIP:: BIRD: ? from the options GRASS, FOREST, BREAK, AND BUSH.
5.10.
Question 10. Complete the series - Paw: Cat:: Hoof: ? from the options Lamb, Horse, Elephant, and Tiger.
6.
Logical Interview Questions for Intermediate
6.1.
Question 1. A snail climbs a well in such a way that during the day, it climbs 3 feet, and during the night, it slips by 2 feet. If the depth of the well is 30 feet, how long will it take for the snail to climb up the entire well?
6.2.
Question 2. If today is Monday, what would be the day after 61 days? 
6.3.
Question 3. According to your understanding, give an example of an informal gathering when a group of people gets together casually and flexibly.
6.4.
Question 4. Raj is going from Delhi to Agra. He wants to know if it's raining in Agra, so he calls two friends to confirm. Each friend has a 2/3 chance of telling the truth and a 1/3 chance of telling a lie.
6.5.
Question 5. Two dice are rolled. What is the probability of getting two on the second roll?
6.6.
Question 6. How many rupees stacked on top of each other take to reach the top of a monument?
6.7.
Question 7. How much does a pear cost? If an apple is 40 rupees, a banana is 60 rupees, and grapefruit is 80 rupees.
6.8.
Question 8. If in a random language, NOIDA is written as OPJEB, how is DELHI written in that language?
6.9.
Question 9. Why are sewer hole covers round?
6.10.
Question 10. Neeraj's mother has four children. Their names are Sunday, Monday, and Tuesday. What is the fourth child's name?
7.
Logical Interview Questions for Experienced
7.1.
Question 1. Consider a situation - A is B's sister, C is B's mother, D is C's father, and E is D's mother. What is the relation between A and D?
7.2.
Question 2. Pointing towards a photograph, Varun said he doesn't have a brother, and Varun's father is his father's son. Whose photograph was he pointing to?
7.3.
Question 3. Rahul is carrying water jugs, a three and a five-liter one. How can he measure four liters of water precisely?
7.4.
Question 4. In how many ways can the letter of the word "WOOLLEN" be arranged?
7.5.
Question 5. Arrange these words meaningfully - country, state, member, community, city, and family.
7.6.
Question 6. What is the probability of rolling a die and getting a multiple of three?
7.7.
Question 7. Five children are sitting in one row. S is sitting next to P but not to T. K is sitting next to R, sitting on the extreme left, and T is not sitting next to K. Who is sitting next to S?
7.8.
Question 8. The day followed by the day after tomorrow is four days before Monday. What day is it today?
7.9.
Question 9. How often do the hour and minute hands of a clock coincide in a day?
7.10.
Question 10. How can a farmer safely cross a river with a fox, chicken, and bag full of corn if he can bring only one item at a time?
8.
Conclusion 
Last Updated: Jun 20, 2024
Easy

Logical Reasoning Questions and Answers for an Interview

Author Pragya
0 upvote
What does it take to become an SDE at MAANG?
03 Jul, 2024 @ 01:30 PM

Introduction

Logical interview questions consist of concepts and problems that require a candidate's reasoning, analytical, and critical thinking skills, such as various types of riddles and logical-mathematical problems. 
These questions allow a hiring manager to test a candidate's ability to think under pressure, time management skills, how conveniently they can use the available resources, and their ability to ask additional questions that help them solve the problems asked during an interview.

logical reasoning questions for an interview

What Are Logical Questions?

Logical questions are inquiries that require reasoning, critical thinking, and analysis to answer. They often involve deducing conclusions from given premises, identifying patterns, or evaluating relationships between concepts. Logical questions are designed to assess an individual's ability to think logically, solve problems methodically, and draw valid conclusions based on evidence or information provided. These questions may appear in various contexts, including academic examinations, job interviews, and puzzles, and they play a crucial role in assessing cognitive abilities and decision-making skills. In essence, logical questions challenge individuals to apply logic and reasoning to solve complex problems and make sound judgments.

Get the tech career you deserve, faster!
Connect with our expert counsellors to understand how to hack your way to success
User rating 4.7/5
1:1 doubt support
95% placement record
Akash Pal
Senior Software Engineer
326% Hike After Job Bootcamp
Himanshu Gusain
Programmer Analyst
32 LPA After Job Bootcamp
After Job
Bootcamp

Importance of Logical Reasoning in an Interview

The purpose of these questions is rarely to know the correct answer. By asking these questions, the interviewer wants to understand how the candidate approaches and solves unfamiliar scenarios. In this article, we will discuss the top 30 Logical Questions for interviews in each category - easy, medium, and hard.

How Do I Prepare For Logical Questions In An Interview?

Preparing for logical questions in an interview involves honing your critical thinking skills and familiarizing yourself with common logical reasoning techniques. Here are some tips to help you prepare:

  • Understand Logical Reasoning Concepts: Familiarize yourself with different types of logical reasoning, such as deductive reasoning, inductive reasoning, and syllogisms. Understand how to apply these concepts to solve problems.
  • Practice Problem-Solving: Solve logic puzzles, brainteasers, and sample logical reasoning questions to improve your problem-solving abilities. Practice identifying patterns, making logical deductions, and drawing conclusions.
  • Review Basic Math and Language Skills: Many logical questions require basic math and language skills, such as understanding mathematical operations, interpreting graphs and charts, and recognizing logical fallacies in arguments. Review these fundamental concepts.
  • Stay Calm and Focused: During the interview, stay calm and focused when presented with logical questions. Take your time to analyze the problem, consider all possible solutions, and communicate your thought process clearly to the interviewer.
  • Ask Clarifying Questions: If you're unsure about the requirements of a logical question, don't hesitate to ask the interviewer for clarification. Understanding the question thoroughly will help you approach it more effectively.
  • Practice Active Listening: Pay close attention to the interviewer's instructions and any additional information provided. Active listening can help you identify key details and constraints that may influence your approach to solving the problem.
  • Seek Feedback: After the interview, seek feedback on your performance in answering logical questions. Reflect on areas where you can improve and continue practicing to strengthen your logical reasoning skills.

Logical  Interview Questions for Freshers

Here are some of the beginner-level logical questions for interview asked frequently - 

Question 1. For the series: 2, 1, (1/2), (1/4), ... What number should follow next?

Answer. (1/8) should follow next. This is a primary division series; each number is one-half (divided by 2) of the previous number.

Question 2. For the series: 36, 34, 30, 28, 24, … What number should follow next?

Answer. 22 is the following number. In this series, there is a subtraction of alternating numbers. First, two is subtracted, then 4, then 2, and repeat.

Question 3. Find the missing element for the series: SCD, TEF, UGH, ____, WKL.

Answer. VIG is the missing element. There are two alphabetical series here. The first series is with the first letters only, i.e., STUVW. The second series contains the remaining letters, i.e., CD, EF, GH, IJ, and KL.

Question 4. What element should follow next for the series: FAG, GAF, HAI, IAH, ____?

Answer. In this series, the middle letters are fixed, so the focus is on the first and third letters. The series has an alphabetical order with a reversal of the letters. The first letters are already alphabetical, i.e., F, G, H, I, and J. The second and fourth are the reversals of the first and third. The missing part begins with a new letter.

Question 5. Which word does NOT belong with the others in parsley, basil, dill, and mayonnaise?

Answer. Mayonnaise doesn't belong to others as parsley, basil, and dill are types of herbs, whereas mayonnaise is not an herb.

Question 6. Which word does NOT belong with the others in punctuation, preposition, adverb, and noun?

Answer. Punctuation doesn't belong to others as nouns, prepositions, and adverbs are classes of words that make sentences. Punctuation belongs to a sentence, but punctuation is not contained in the class of words.

Question 7. For books, which is the most necessary word? Fiction, pages, pictures, or learning?

Answer. The necessary part of any book is its pages; no book is without pages. Not all books are fiction or have pictures, and learning may or may not occur with a book.

Question 8. What is the sum of numbers from 1 to 100?

Answer. To calculate the sum of the first 'n' natural numbers, use the formula (n*(n+1))/2. In this case, the value of n is 100; thus, (100*(100+1))/2 is equal to 5050.

Question 9. Complete the series - CUP: LIP:: BIRD: ? from the options GRASS, FOREST, BREAK, AND BUSH.

Answer. BEAK is the correct choice. A person drinks out of a cup with their lips, and in the same way, birds bite grass with their beaks.

Question 10. Complete the series - Paw: Cat:: Hoof: ? from the options Lamb, Horse, Elephant, and Tiger.

Answer. Horse is the correct option. Cat's feet are called paws, and horse's feet are called hoofs.

Logical Interview Questions for Intermediate

Here are some of the medium-level logical questions for interview asked frequently - 

Question 1. A snail climbs a well in such a way that during the day, it climbs 3 feet, and during the night, it slips by 2 feet. If the depth of the well is 30 feet, how long will it take for the snail to climb up the entire well?

Answer. As the snail is climbing 3 feet and slipping by 2 feet, its progress in one day is 1 foot. So, in 27 days, it can climb up 27 feet. On the 28th day, if it climbs up by 3 feet, it will be out of the well and cannot slip down. Thus, he took 28 days.

Question 2. If today is Monday, what would be the day after 61 days? 

Answer. Questions like these are framed to check the level of conceptual, smart thinking and how fast they can tackle logic. As we know, each day of the week is repeated every seven days. Thus, after sixty-three days, it would be Monday. So, after sixty-one days, it would be Saturday.

Question 3. According to your understanding, give an example of an informal gathering when a group of people gets together casually and flexibly.

Answer. Professional gatherings should be fun yet be conducted, keeping dignity intact. A suitable example can be when an employee takes a few of his colleagues out for a quick dinner after work on a salary appraisal.

Question 4. Raj is going from Delhi to Agra. He wants to know if it's raining in Agra, so he calls two friends to confirm. Each friend has a 2/3 chance of telling the truth and a 1/3 chance of telling a lie.

Answer. All three friends confirm that it's raining. What is the probability that it is raining in Agra?
Raj only needs one friend, to tell the truth. So if he calculates the odds of them all lying, that's 1/3 multiplied together, equaling 1/27 (1/3 x 1/3 x 1/3).
This means there is 1 in 27 chances that all three friends are lying. So, there is a 26/27 chance that at least one of them is telling the truth, which is 96% that it is raining in Agra.

Question 5. Two dice are rolled. What is the probability of getting two on the second roll?

Answer. First, calculate the probability of rolling two overall, a 1/6. That would be the same for the second roll as well. Then, multiply those probabilities together, which is 1/12 probability of getting a two on the second roll.

Question 6. How many rupees stacked on top of each other take to reach the top of a monument?

Answer. To answer this, the candidate would require to know how tall the monument is and how tall a rupee is when it is kept flat. Considering it to be one-half of a centimetre high, divide the height of the monument by the height of a rupee to get the number required to stack up.

Question 7. How much does a pear cost? If an apple is 40 rupees, a banana is 60 rupees, and grapefruit is 80 rupees.

Answer. On counting the vowels of each fruit word, it is found that each vowel is 20 rupees, so a pear will cost 40 rupees.

Question 8. If in a random language, NOIDA is written as OPJEB, how is DELHI written in that language?

Answer. Questions like these are asked to test a candidate's coding and decoding skills. In this case, every letter in the word NOIDA is one step forward to form the word OPJEB. Thus, for DELHI, D will become E, E will become F, L will become M, H will become I, and I will become J; therefore, the code is EFMIJ.

Question 9. Why are sewer hole covers round?

Answer. Sewer covers are round so that they are easy to use. There's no requirement to rotate them to put on. Also, they do not fall into the hole if they turn sideways. A square might cover diagonally.

Question 10. Neeraj's mother has four children. Their names are Sunday, Monday, and Tuesday. What is the fourth child's name?

Answer. Some questions are asked to test a candidate's listening skills and attentiveness. The simple answer to this question is Neeraj, who's the fourth child, as mentioned at the start of the question.

Logical Interview Questions for Experienced

Here are some of the medium-level logical questions for interview asked frequently-

Question 1. Consider a situation - A is B's sister, C is B's mother, D is C's father, and E is D's mother. What is the relation between A and D?

Answer. Blood relation questions are common and sometimes the most complex set of logical questions to answer in an interview. 
According to the question, A is B's sister, and B is C's daughter. Thus, A is C's daughter. Also, D is C's father. Therefore, A is B's granddaughter.

Question 2. Pointing towards a photograph, Varun said he doesn't have a brother, and Varun's father is his father's son. Whose photograph was he pointing to?

Answer. Such questions are asked to interpret the candidate's logical thinking and understanding and can sometimes be hard to answer. In this scenario, it was Varun's son's photograph. Varun had no brother, so he was the only son of his father, and he was his father's son himself. Thus, Varun is the father of the person in the photograph, so the person in the photograph is his son.

Question 3. Rahul is carrying water jugs, a three and a five-liter one. How can he measure four liters of water precisely?

Answer. Rahul must fill the three-liter jug and pour it into the five-liter one. He would fill the three-liter one again and pour it into the five-liter one until it was full, leaving one liter in the three-liter jug. He would throw out the five-liter jar, pour the one liter into it, then fill up the three-liter one and add it to the five-liter jug, which now has four liters.

Question 4. In how many ways can the letter of the word "WOOLLEN" be arranged?

Answer. During interviews, mathematical questions like permutations and combinations are also asked to understand a candidate's high-level thinking and aptitude. 
In this question, the word WOOLLEN consists of seven letters in which O and L are repeated two times. The required number of permutations for the word WOOLLEN can be calculated as :
7! /((2!)*(2!)) which is (7*6*5*4*3*2)/(2* 2). On solving, the final answer comes out to be 1260. Thus, 1260 words can be formed.

Question 5. Arrange these words meaningfully - country, state, member, community, city, and family.

Answer. This is a question to test a candidate's verbal reasoning. It helps a candidate to understand that multiple members form a family, numerous families form a community, numerous communities form a city, multiple cities form a state, and numerous states form a country. Thus, the meaningful sequence of these words is members, family, community, city, state, and country.

Question 6. What is the probability of rolling a die and getting a multiple of three?

Answer. There are six sides on the dice, and every side has a probability of 1/6, and 3,6 are the only possible outcomes that are multiple of 3. Thus, the total possibility would be 2/6, equal to 1/3.

Question 7. Five children are sitting in one row. S is sitting next to P but not to T. K is sitting next to R, sitting on the extreme left, and T is not sitting next to K. Who is sitting next to S?

Answer. Directions based questions are very common during interviews and many candidates find them to be very confusing. Thus, these need to be practised.
Here, S is sitting next to P. So the two possible orders can be S, P, or P, S. K is seated next to R. Thus, the order R, K is possible because R is on the extreme left. T is not next to either P or K.
So the possible arrangement is R, K, P, S, T. P and T are sitting next to or adjacent to S.

Question 8. The day followed by the day after tomorrow is four days before Monday. What day is it today?

Answer. Many qualities of a candidate, like sharp thinking, attentiveness, and logical approach of a candidate can be tested through this question. Here, Four days before Monday is Thursday, as four days after Thursday is Monday. Also, the day followed by the day after tomorrow is Thursday only if the present day is Monday.

Question 9. How often do the hour and minute hands of a clock coincide in a day?

Answer. Logical reasoning questions related to time are often asked to confuse the candidates and can be hard to solve sometimes if not understood properly. The hour hand and the minute hand of a clock coincide eleven times every twelve hours; between 11 and 1, they coincide only once at 12 o'clock. The remaining times are 12:00, 1:05, 2:11, 3:16, 4:22, 5:27, 6:32, 7:38, 8:44, 9:49, and 10:55.

Question 10. How can a farmer safely cross a river with a fox, chicken, and bag full of corn if he can bring only one item at a time?

Answer. First, the man and the chicken cross the river as the fox and corn are safe together. He leaves the chicken on the river's other side and then returns.
Secondly, the farmer takes the fox across the river, and since the fox and the chicken can be kept together, he brings the chicken back.
Thirdly, as the chicken and corn can't be left together, he leaves the chicken, takes the corn across, and leaves them with the fox.
Finally, he returns to pick up the chicken and moves across the river.

Conclusion 

In this article, we have discussed WordPress. We have discussed easy, medium, and hard logical questions for interview.

We hope this article helped you in learning ci cd interview questions. You can read more such articles on our platform, Coding Ninjas Studio. You will find articles on almost every topic on our platform. 

Recommended Reading:

Embedded Interview Questions

Also, you can practise coding questions at Coding Ninjas to crack good product-based companies. For interview preparations, you can read the Interview Experiences of popular companies.

Also check out, Zomato Interview Experience to learn about Zomato’s hiring process.

Live masterclass